Gas-Lubricated Porous Bearings of Finite Length—Self-Acting Journal Bearings

[+] Author and Article Information
Erh-Rong Wu

Shaker Research Corporation, Ballston Lake, N. Y. 12019

J. of Lubrication Tech 101(3), 338-347 (Jul 01, 1979) (10 pages) doi:10.1115/1.3453368 History: Received April 17, 1978; Revised June 06, 1978; Online October 20, 2010


The effects of porosity on the performance of gas bearings are investigated. A thin-wall approximation is developed to simplify the coupling between the Reynolds equation in the fluid film and the three dimensional Laplace equation in the porous matrix. The Newton-Raphson method is used to linearize the modified Reynolds equation and the column method is employed to solve the system of linear equations in matrix forms. The solution of a solid-wall bearing is included as a special case. Bearing characteristics are presented in tables and charts for varied permeabilities, slip coefficients, porous layer thicknesses, eccentricity ratios, length-to-diameter ratios, and for a wide range of compressibility number.

Copyright © 1979 by ASME
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